Guide to Domestic Police Dogs

After fleeing the scene, after everyone entered the meeting room, the first thing they did was to take a big mouthful of fresh air to relieve the suffocation that had just been hit by the stench.

Gu Xinxin didn't go. After the group of them came back, they silently frowned and turned on the small air purifier next to them.

"Wow, comrades in forensic medicine have worked so hard..." Sun Chengming said next to Gu Nianyi, "That smell has strong penetrating power even with a three-layer mask."

"Everyone is more or less contaminated." Gu Nianyi sniffed with his nose like a dog, and then turned his head to sniff Xu Luo.

Xu Luo raised his wrist, sniffed against his wrist with the tip of his nose, and frowned: "..."

On the other hand, Li Tai and Zhang Chang have been discussing the current case intensely since they came out just now. Although the goal is very clear, the lack of strong evidence is still the fatal key to this case.

Gu Nianyi and others didn't dare to interrupt, so they could only do what they should do for a while.

"Gu Nianyi!" Li Tai shouted, "Come here!"

"..." Gu Nianyi didn't expect that he would become the focus of controversy, so he walked over with some anxiety.

Zhang Chang had a cigarette in his mouth. Although Li Tai didn't say anything, his expression was disgusted.

"Both corpses and people are there. You have interrogated the other party so many times. Do you think what I said makes sense? The stabbing angle is unreasonable, so there must be something unreasonable." Li Tai said, "We can't miss anything. A proof."

"I know, actually I think it's quite obvious..." Gu Nianyi said, "It's just that there is a little logic in the middle, we can't find Zheng Chenglong's murderous intention to kill Chen Hao."

"Indeed, or is he just pretending to be crazy?" Sun Chengming approached and asked.

"What logic is not logical? Does passion kill people need logic?!" Li Tai said.

Gu Nianyi glanced sideways, and Xu Luo also came here.

"A few days ago, I got the HRNB (HR neuropsychological test set) conducted by the cooperative medical institution on Zheng Chenglong. The test result was mild brain damage, which was mainly manifested in some behavioral tests. In fact, it still caused some harm to his mind and body." Xu Luo looked at Gu Nianyi and said, "I thought about it, and there are only two possibilities, one is... Zheng Chenglong knew that Zheng Chenglong After Min killed Chen Hao, he was willing to help his son take the blame and dismembered the corpse, or Zheng Min didn't do anything at all, it was Zheng Chenglong who killed someone and then dismembered the corpse. Another possibility is that he suppressed the perversion in the room, Purely for the pleasure of venting, and finally throwing away the body to hide the body, these are the conclusions I have drawn based on his psychiatric report."

"So you all think that it's basically the two of them?" Li Tai said.

"I think so." Gu Nianyi said.

"I also think there is no problem." Sun Chengming said.

"The father and son Zheng Min and Zheng Chenglong will be interrogated tonight. Let's see what they can say before the evidence." Zhang Chang sighed, "Okay, let's go to dinner first."

……

After lunch, Gu Nianyi said he was going to find He Tian, ​​and Xu Luo also said that he had something to do in the afternoon, so the two parted ways and went to work separately.

Gu Nianyi went to the Physical Evidence Appraisal Center, and the technical experts of the graphic investigation called up all the surveillance videos before, and edited the hundreds of gigabytes of video before, and they cut important images non-stop for several days.Now at this stage, they have turned over every video repeatedly and remembered the details.

So Gu Nianyi turned on four screens for his own observation. The earliest surveillance video was indeed kept for half a year, but during this half year, Zheng Chenglong also came out. This is what Gu Nianyi thought strange before.

He went to the Internet cafe to find Zheng Min, and also went to school with Zheng Min. He would come out to buy cigarettes, that is, the small shop where Gu Nianyi bought cigarettes before. Occasionally, he would bring some candies when he went back. I ate by myself... so it's not completely unfree.

"Are you looking at Zheng Min and his father and son?" He Tian walked over and said, "That's right...ah, that's right, I forgot to show you before."

"What!" Gu Nianyi jumped up from the chair.

"I just remembered it when I saw you. My fault." He Tian pulled her computer from the side and said, "The main reason is that it takes a little time for our technology to restore the deleted files, and I don't think this evidence is important."

"When Zheng Min was playing games before, their trade union had an event at night, and there was a small screen recording." He Tian said, "I didn't expect that our technology would finish listening to the two hours of screen recording, and I heard their father and son talking together. It's a conversation of more than ten seconds."

He Tian played that conversation for Gu Nianyi to listen to.

Zheng Min said: "Damn, why did you come out again? It was agreed to come out four times a month, but you came out twice at the beginning of the month."

Zheng Chenglong said: "You didn't come back after you finished smoking."

"Hey." Zheng Min smiled for a while, "I won't come back."

Someone said: "Aaron, is that your parent? Are you going back?"

Zheng Min said: "Well, my dad. Don't worry, he will listen to me, and he will do whatever I ask him to do."

"It's gone." He Tian said, "It's not something important."

"It's really not something important." Gu Nianyi continued to flip through the video.

Zheng Chenglong, who last appeared in the video before the incident, was in the small shop downstairs. The small shop is a place he often visits. Gu Nianyi also asked the owner of the small shop, and the evaluation he got was that he looked He's eccentric and honest.

The last time, he bought a pack of cigarettes, and then bought two lollipops.

Gu Nianyi paused, and took a breath, "To what extent do you think parents can love a child..."

"Perhaps willing to give up his life? But I don't feel anything..." He Tian shrugged, "But I don't think this kind of crazy trafficker can do anything to love children."

Gu Nianyi scratched his head and leaned back on the chair helplessly.

"Shouldn't you ask that question?" He Tian said, "If you ask me, I don't have any children, and I can't empathize with you."

"Who is it?" Gu Nianyi began to search for those colleagues with children in the team in his mind.

"Xu Luo?" He Tian said.

"..." Gu Nianyi turned his head and said, "He has no children!"

He Tian was taken aback by his voice, and said: "...I didn't say that he has children, he has research in this area, is it right for you to ask him?"

"...Oh." Gu Nianyi said a little guilty, "What do you mean..."

He Tian shook her head and moved the computer back: "What do you think?"

After checking all the monitoring again, he didn't find any information that was particularly useful to him.Gu Nianyi stood up and walked around for a while, went to the corridor to check the time, the whole afternoon passed, and Xu Luo didn't know where he was going.

Sun Chengming looked for him once, but he didn't see him. In the afternoon, they interrogated Zheng Chenglong again. Gu Nianyi didn't know the result yet, but he could probably guess what he would say.

So Gu Nianyi called Xu Luo.

After a while, Xu Luo connected and said, "Have you finished watching the monitoring?"

"Hmm." Gu Nianyi said, "Nothing special, where are you?"

"It was near the school before." Xu Luo said, "I wanted to see if there were any clues, so I visited some people, and after I came back, I followed Brother Sun to chat with Zheng Chenglong for a while. He pleaded guilty and said that the murder weapon had been found by him. threw."

Xu Luo said: "This is the first time he talked about the murder scene and the thing about him throwing the murder weapon in these few conversations."

Gu Nianyi walked in the corridor and said, "You...do you think Zheng Chenglong will help Zheng Min kill Chen Hao just because of Zheng Min's words?"

"I don't know how to explain it." Xu Luo said, "I didn't feel anything before, but during the few conversations with Zheng Chenglong, I think he loves Zheng Min very much. The love between father and son is very complicated, and you It can be understood as a kind of debt."

"This kind of debt is worth killing for his son?" Gu Nianyi asked again.

"This is another point. Zheng Min shut down Zheng Chenglong. If Zheng Chenglong wants to go out, he must please Zheng Min." Xu Luo said, "During the conversation with Zheng Chenglong in the afternoon, I asked him some questions again. For example, their way of getting along with Zheng Chenglong Why did Min plan to lock him up with these words?"

"How did he answer?" Gu Nianyi asked.

"I can describe his answer in four words, well-trained." Xu Luo said, "Deliberately took some questions to himself, and admitted that he killed the person, and the murder weapon was thrown away after killing the person. Yes, he did not wipe it deliberately. He is protecting Zheng Min, and this kind of protection is both innate and acquired. The innate lies in the kinship that is connected by flesh and blood, and the acquired lies in the fear that Zheng Min's control over him makes him feel."

Gu Nianyi looked up after hearing his words, and saw Xu Luo standing in front of him, their eyes met at both ends of the corridor.

Xu Luo looked at him and put down the phone.

The two walked side by side in the corridor, towards the direction of the conference room.

"Even if he pleads guilty, if he doesn't find the murder weapon, he won't be able to close the complete chain of evidence. In the end, he can't be convicted of intentional homicide. Of course, the other crimes basically didn't go away. The father and son are bloodstained, and the punishment will not be light." Gu Nian Yi and his shoulders rubbed against each other, he enjoyed this kind of physical contact, and said, "You just now..."

"The law will not let the bad guys go." Xu Luo looked up at Gu Nianyi, the corners of his mouth slightly raised, "Right."

"...Well." Gu Nianyi let out a breath, his eyes sank, "According to the wounds of the corpses, it can be seen that the tool used to commit crimes was a knife, and there were various trace elements such as sodium chloride in the wounds, but actually the knives in their home were detected According to the results of the blood stain reaction, the diluted blood traces are not human blood but animal blood, so it can be confirmed that the murder weapon is not in the room. If Zheng Chenglong said that he threw the knife away..."

"Knives are classified into special categories when garbage is sorted and recycled. Now that there are garbage sorters in every community, it is obviously very easy to find a discarded knife." Gu Nianyi said, "We have done this job before. , and nothing was found in the end. So like the corpse, the murder weapon may have been temporarily hidden or discarded further afield."

Gu Nianyi rubbed his chin with his hand: "From Zheng Min's murder and dismemberment to our discovery, he has every chance to dispose of the knife, but there is a very important psychological game involved."

"Well, it's dealt with. The moment the murderer was found, the murderer was basically locked." Xu Luo said, "So since the corpse is in a place that I can confirm, maybe the murder weapon is also there?..."

"Do you remember the Lu Fan case? After the murderer hid the knife, he used his familiarity with the nearby geographical location to put it back in place to hide it." Gu Nianyi said, "Will the same trick be repeated, or Using the same method, but this is just a guess..."

"There is also a possibility that Zheng Chenglong did not lie, and this knife may have been picked up by someone." Xu Luo said.

"..." Gu Nianyi was stunned for a moment, and immediately said, "Is this possible?"

Xu Luo took out his book, shook it to him and read: "The battery of the middle-aged man in 201 is not of his own brand, the old lady in 302 has the habit of picking up trash every week, and the cleaner in the next building The recyclable waste that has been sorted will be picked up for home use or sold.”

"...?" Gu Nianyi said, "You have been investigating all afternoon..."

"I just chatted with the residents in the past few days. If you police rush to investigate, in fact, they won't tell the truth about unimportant things." Xu Luo closed the book, "So talking to them slowly may be the clue. Appeared in such small talk."

Gu Nianyi nodded and said, "Okay, I see."

"Are you going to the scene?" Xu Luo folded his arms.

"Yes." Gu Nianyi said, "I hope there will be a good result."

……

After ten o'clock in the evening, before Gu Nianyi returned to the bureau, he called all the team members and the detachment leader and deputy detachment leader, and informed them: "The murder weapon was found."

"Found it!?" Zhang Chang was a little surprised, "The murder weapon was found so quickly in the afternoon?"

"At the old lady's house in 302 downstairs." Gu Nianyi put the murder weapon in the evidence bag on the table and shrugged his shoulders, "Thanks to Dr. Xu, I have visited and investigated the neighbors in the past few days. This old lady has a habit of picking up garbage, and she found discarded garbage downstairs and picked it up as ordinary kitchen knives."

"Didn't you find it in the most conspicuous place?!" Li Tai patted his hands on the table, "Look at what I said, look at your efficiency! Is there 20 meters up and down under your nose? Can't find out Can't you look around? How come you couldn't ask the residents to record a fart before, but Xu Luo asked so many things?"

"I think this case has already been solved very quickly among similar cases, so don't embarrass them with these words." Zhang Changdao, "It's done very well, but I hope to be more careful in the future."

"Have you sent it for appraisal!" Li Tai didn't want to talk nonsense with them, so he could only say in a bad mood.

"Yeah." Gu Nianyi raised his hand and said, "The appraisal result is also out."

Li Tai walked over quickly, snatched the report from his hand, and said angrily: "It's more about speed now, what was the manpower and police force wasted before... In this case, all of you were really played around by the murderer. Let people see the joke!"

After Li Tai finished cursing, he began to read the appraisal report.

He looked tense, and after reading the words one by one, he slapped the table and pointed his finger in the air: "Since there are witnesses and physical evidence, and the suspect also pleaded guilty this afternoon, this case..."

He paused for a moment, and his eyes flicked across Gu Nianyi's face: "The case can basically be closed."

Seeing his attitude, other people also went up to read the physical evidence appraisal report, which stated in detail that Zheng Chenglong's fingerprints were extracted from the knife, but no one else.

"But it's too clean..." Zhang Chang said, "No one has used this knife before? If there are only Zheng Chenglong's fingerprints, does it mean that the previous knife may have been cleaned up?"

"No one cooks in their house, so it will be very clean. I think it might be that he just randomly drew a knife and then threw it away." Xu Luo said, "It's not an unreasonable thing."

"Ask Zheng Min again!" Zhang Chang said, "The toothpaste is squeezed to the last bit, so we have no reason not to squeeze it out."

……

A short and long month.

The speed of solving the case of dismemberment in the bathroom is considered to be the fastest among similar cases. By the way, the big boss of the previous abduction case was also involved, and it became a vicious abduction and homicide case that attracted national attention.However, because of the rapid speed of solving the case, almost all the police forces that could be mobilized in Heixi City have been used.

In the past half a month, Zhang Chang led a team to search the mountain in those few days, and nearby villagers said that they saw wandering lights, walking on the mountain like winding fireflies. It can be seen that the police force at the grassroots level has been mobilized to an almost saturated state. Look for dead bodies.

Although a lot of useless work has been done, it still has a result.Most of the time during the investigation, especially the boring investigation stage, everyone is just piled up with useless work.

Two days later, Gu Nianyi stood in front of the whiteboard, wearing a dark blue uniform, with a video of his speech for the upcoming case summary meeting behind him.

As the images of what they experienced these days appeared, Xu Luo raised his head and watched, followed by Gu Nianyi's correct voice, and returned to the scene of the crime that day.

……

Zheng Min, Chen Huihui, and Chen Weiwen are neighbors living in the same building.

Zheng Min is Zheng Chenglong's biological son, Chen Weiwen is Chen Hao's biological son, and Chen Huihui is a girl who was abducted by Zheng Chenglong from other provinces when he was two years old. She was also the last child he sold. After bringing this child from other provinces, he Temporarily put the child at home.

At that time, Chen Hao had no child yet, the moment he saw Chen Huihui, he immediately asked Zheng Chenglong about the child.

After that, he bought Chen Huihui for 3 yuan and planned to raise him as his daughter.

Chen Hao's purpose in buying this "daughter" was not pure in the first place, and Zheng Chenglong also fully knew the reason.Chen Huihui and Chen Hao's mother looked alike when they were young, even the position of the mole was exactly the same. Although Chen Hao's Oedipus complex was not revealed, it was a well-known secret to some extent.When he saw Chen Huihui for the first time, he hugged her excitedly and called his mother's name several times.

However, Zheng Chenglong also told him from the very beginning that Chen Huihui had congenital heart disease, and was younger than other children of the same age from the beginning, and was particularly prone to illness. He did not expect to sell this child at a good price when he abducted it. It's my last order.

It was also at that time that Chen Hao was pursuing a woman who was also very similar to his mother in a certain temperament. He was very good at finding women with such appearance, temperament and this type.

So at that time, in order to cover up the lie that he had bought a child, Chen Hao used some demands to let the girl go home with her. If they could get married, the child's adoption would be a matter of course.

But now, Chen Hao is dead, and there is no news of the girl. The police have used many methods to find it but to no avail, so no one knows why they broke up at that time.This can be regarded as a small episode, but at least the result is that the existence of this child was suddenly lied to, and it really became a matter of course.

Chen Hao became a "single parent", the "daughter" of his ex-wife.Although Zheng Chenglong had previously promised that he could settle the household registration for Chen Huihui, the policy suddenly changed afterwards, which made this matter repeatedly stranded.

The next few years were the beginning of Chen Huihui's nightmare.

In Zheng Min's words, Chen Huihui had very few happy times these years. The only time he was impressed was when Chen Weiwen was born and he was brought back to this home.

From then on, this younger brother and the neighbor's elder brother who played well with her were her only companions, because Chen Hao had cut her hair short since her younger brother came back, and she had to wear his younger brother's clothes if she wanted to go out.Although she doesn't mind sharing everything about herself with her younger brother, as she grows up, she vaguely feels that she is playing the younger brother.

The seeds of hatred were buried deep in the heart of not only the victim alone. Although the younger brother and the neighbor's elder brother were three unrelated people, they soon became dependent on each other.

Zheng Min was seven or eight years older than Zheng Huihui and was the oldest among them.Now handcuffed and wearing an orange vest, he sits in a chair looking ahead.

Zheng Min raised his head slowly: "When did you find out? It should be two years ago. I saw Hui Hui coming out of the house one day. She looked at me with red eyes and said that her legs were very painful."

"I'm a boy, and I don't have a mother. I can't help her a girl at all. I checked the information on the Internet. Any help I know is a secondary injury. I am the oldest among them. I want to fundamentally I went online to solve the problem, and then I chose to call the police." Zheng Min said, "But I only knew at that time that Huihui has no identity. If she is found, she will be taken to the orphanage, and we may lose contact. gone."

"Also, after I hesitated at the time, the police at the police station might think I had a problem, so they asked me if I was lying, and if I did something to the girl so I turned myself in, I was very angry after hearing that." Zheng Min Said, "And that night, a policeman came to my house, and my dad passed the matter on to Chen Hao after he knew about it. The next day, Huihui was tortured terribly."

Zheng Min kept his mouth shut when he said this, he didn't describe in detail what "very miserable" was.

If you can't solve it, you can only cut it off from the root.

"When did you start planning?" Zheng Min raised his head and looked at the ceiling, "I don't remember exactly, but what I can be sure of is that my initial plan was to close Chen Hao and my dad. Get up. I just want to lock them up... I read an article before, and that article was still very popular among our classmates. It said that how to control a person is to cut off his connection with the outside world. So..."

Zheng Min said: "I want to try."

On the 19th, Zheng Min sent a message to the senior management of Chen Hao's company, with the purpose of getting the other company to fire him.If the company is indifferent, Zheng Min has other plans.Of course, it succeeded once... Chen Hao resigned as he wished, which was the first step in cutting off his social ties.

Chen Hao's interpersonal relationship is simple. After he left his social role, Zheng Min's idea was actually very simple at the beginning, which was to negotiate with him and tell him that he is still locked up alone. If you don't want to become like him, don't treat him. Chen Huihui committed another violation.

"After locking up my dad, my dad has changed. Of course, he was also very annoying before..." Zheng Min laughed twice, "But I think... the feeling of controlling people is very good. You will feel that you It's a grown-up, and the grown-ups control the world, and you control the grown-ups, look, isn't it great?"

"I'm going to do the same thing and give Chen Hao a bad start. But on the 22nd, Chen Hao was drunk, and he treated Huihui again..." Zheng Min didn't continue, and then he said, "Huihui has a fever, and Chen Hao still took her I went to the hospital to see a doctor. I had to go to class that day. When I came back, I was going to go to her house, but I found that Chen Hao was drunk again. look at me."

Zheng Min recalled that day, his expression was still calm, he shrugged his shoulders: "I didn't use any special method, I just called Zheng Chenglong, I said you are willing to kill him, and dispose of the body with me, I will let you go."

He said: "I didn't expect that Zheng Chenglong told me that he just wanted to come back and live with me instead of staying in that place all the time. The moment I agreed to him, he stabbed him to death with a knife... Then when he dismembered the body , the whole bathroom was covered with blood, on the roof, on the faucet, and on the toilet, splashed everywhere, just like in the movie, this is the first time I know that blood can be sprayed so high after cutting someone’s neck, it’s amazing.”

He laughed: "Actually, I was on the bus that time, and I wanted to try that feeling again. But it's really hard to catch people in a sober state. They will attack you, and Chen Hao was drunk that day. It's really quiet, and there's no difference before or after death."

"At that time, Chen Weiwen also came home from school. He was sitting in the living room, so Zheng Chenglong went out wearing bloody clothes. He threw it off in front of him, and then gave him a lollipop from his pocket. I have one." Zheng Min said, "He liked to use this kind of thing to calm my emotions when he was young."

After that, Zheng Chenglong cleaned up the scene for two days.Zheng Min has been planning Chen Hao's "posthumous plan".

It was their original intention to let him "live for a while", hoping that at least after Chen Huihui was arranged to leave, he could continue to live for a while.Originally, this time was at least half a month, because Zheng Min thought that there was enough time to plan a route for Chen Huihui.

Chen Huihui was sent away the next day, and Zheng Min asked him to take Chen Hao's cell phone with him.On the one hand, it is easy to contact, and on the other hand, it is to create the illusion that Chen Hao was taken away. In this way, when things are stable, it is logical to say that he disappeared in Guishan.In this way, she can go to the next destination to delay time.

"But I never thought that the police would come to the door." Zheng Min said, "I did not kill anyone, but this incident has already happened, and we didn't even have time to dispose of the body at that time."

"Yeah." Gu Nianyi brought up the evidence, "Zheng Chenglong's fingerprints were found on this knife, but yours was indeed not found. But now, what's the difference between killing people and not killing people?"

"Of course." Zheng Min said.

"So after the police came, you planned to play tricks on the police, pretending that the corpse was shipped out, and following the plan with the police, pretending to worry that he would be cheated into pyramid schemes, and on the other hand, you framed your father for not going home." Gu Nianyi became more and more angry as he spoke. , "You are really courageous, little brother."

"You're welcome." Zheng Min said.

"Also." Gu Nianyi said with a serious expression, "Where is Chen Huihui?"

"I don't know where she is." Zheng Min said, "Zheng Chenglong sent her to the car. After her signal disappeared, we never contacted again."

He smiled faintly: "Maybe we won't be in touch in the future, so... If you find her, I hope you will take good care of her. After all, in the past seven or eight years, she has lived like a ghost, You don't feel the pain at all."

"Is there nothing else to say?" Gu Nianyi asked.

"It's gone." Zheng Min said.

"Don't you regret it?" Xu Luo asked.

"I don't regret it." Zheng Min said, "Maybe I will regret it when I am older, at least not now, even if I die, I think it is worth it."

"I hope you think about the significance of these things." Gu Nianyi said, "I hope you know that the way to punish evil is not to kill innocent people indiscriminately."

Zheng Min watched Gu Nianyi smile even more happily, and nodded slightly at him: "Yeah."

Gu Nianyi printed out the confession, took the ink pad in front of him, and asked Zheng Min to press his fingerprints.

……

"It's over?" Li Tai looked at Gu Nianyi.

"Well." Gu Nianyi put down the laser pointer and sat back in his seat, "The above is the whole case. The next point is that we will trace the whereabouts of Chen Huihui. Although Chen Huihui has no identity, she has been violated for many years. We can't be reunited with our family either, but we're going to find her anyway."

"Of course." Zhang Chang said, "I have notified the local police to search along the way. Didn't we not see her surveillance video on the train? Our analysis shows that she may have got off the train earlier, and then I parked my mobile phone in the car and drove along the journey, and it was said that someone saw her figure... Forget it, let's talk about it later! Go ahead, Gu Nianyi."

"Actually... I don't have anything to say anymore. Thank you for your dedication to this case." Gu Nianyi stood in the front row and bowed deeply, "It's not easy for everyone. After the case is over, you must have a good rest. Because we're not quite done yet."

Li Tai stood up and answered, "Let me say a few words..."

Gu Nianyi walked back to his seat, and Sun Chengming quietly clapped his hands beside him.

Gu Nianyi didn't appreciate it at all, knocked off his hand, and said: "...I'm tired, I'm going back to sleep."

"You're still listless after the case is solved." Sun Chengming said, "Don't worry, there's news about a little girl over there today."

Gu Nianyi was drinking water, when he heard this, he raised his eyelids and said, "Really?"

"Well, didn't the Zhang detachment just say that the mobile phone might have been put on the car at that time, and she might have gotten off with the crowd after a few stops." Sun Chengming said, "And we are on the platform near Qiancaocun Station. The police found out that a little girl with a similar appearance did appear recently."

The author has something to say:

When you tell a lie, you have to cover it up with another lie.

The murderer will be punished, what you believe is the ending and the truth, and there will be no second ending.